The single electron R-pump: first experiment

TL;DR

This paper reports the first experimental realization of a single electron R-pump, a three-junction aluminum circuit with resistors, achieving high accuracy in electron transfer suitable for quantum metrology applications.

Contribution

It presents the fabrication and testing of the first single electron R-pump with on-chip resistors, demonstrating near 10^-8 transfer accuracy, a significant step forward in quantum current standards.

Findings

Electron transfer accuracy approaches 10^-8

Successful fabrication of a three-junction Al circuit with resistors

Preliminary experimental results from PTB

Abstract

We fabricated and tested the single electron R-pump, i.e. a three-junction Al circuit with on-chip Cr resistors. We show that due to the presence of the resistors (R > h/e^2 = 25.8 kOhm), the accuracy of electron transfer in the R-pump can approach the level of 10^-8. Preliminary results of experiment with the R-pump made at PTB are reported.